Get a shoe maker/repairer or someone who works in leather to cut you 2 discs of thin leather, a bit larger diameter than the rings on your strap, and to punch a hole in the centre of each of them a fraction larger in diameter than the height of the lug on the camera body. Slip a disc of leather over each lug and then clip the split ring of the strap in each lug. You will have a disc of leather between the split ring and camera body to protect the camera body.

A&A use a similar technique with their wrist strap which I have, except the leather piece is actually part of the strap itself, and the split ring sits on top of it.